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Lie Groups: Structure, Actions, and Representations: In Honor of Joseph A. Wolf on the Occasion of his 75th Birthday PDF

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Progress in Mathematics 306 Alan Huckleberry Ivan Penkov Gregg Zuckerman Editors Lie Groups: Structure, Actions, and Representations In Honor of Joseph A. Wolf on the Occasion of his 75th Birthday Progress in Mathematics Volume306 SeriesEditors HymanBass JosephOesterle´ YuriTschinkel AlanWeinstein Alan Huckleberry (cid:129) Ivan Penkov Gregg Zuckerman Editors Lie Groups: Structure, Actions, and Representations In Honor of Joseph A. Wolf on the Occasion of his 75th Birthday Editors AlanHuckleberry IvanPenkov FacultyofMathematics SchoolofScienceandEngineering RuhrUniversita¨tBochum JacobsUniversity Bochum,Germany Bremen,Germany SchoolofScienceandEngineering JacobsUniversity Bremen,Germany GreggZuckerman DepartmentofMathematics YaleUniversity NewHaven,CT,USA ISBN978-1-4614-7192-9 ISBN978-1-4614-7193-6(eBook) DOI10.1007/978-1-4614-7193-6 SpringerNewYorkHeidelbergDordrechtLondon LibraryofCongressControlNumber:2013941881 Mathematics Subject Classification (2010): 53C15, 53B15, 31B05, 32L25, 44A15, 22E46, 32M10, 32M05, 46E22, 32S55, 43A85, 21EXX, 14LXX, 16RXX, 16WXX, 22E65, 22E45, 32A25, 22E30, 58B99,58J20,58J40,20F50,19A31,57R67,32N10,20G05,13A50,43A32,43A90 ©SpringerScience+BusinessMediaNewYork2013 Thisworkissubjecttocopyright.AllrightsarereservedbythePublisher,whetherthewholeorpartof thematerialisconcerned,specificallytherightsoftranslation,reprinting,reuseofillustrations,recitation, broadcasting,reproductiononmicrofilmsorinanyotherphysicalway,andtransmissionorinformation storageandretrieval,electronicadaptation,computersoftware,orbysimilarordissimilarmethodology nowknownorhereafterdeveloped.Exemptedfromthislegalreservationarebriefexcerptsinconnection with reviews or scholarly analysis or material supplied specifically for the purpose of being entered and executed on a computer system, for exclusive use by the purchaser of the work. Duplication of this publication or parts thereof is permitted only under the provisions of the Copyright Law of the Publisher’slocation,initscurrentversion,andpermissionforusemustalwaysbeobtainedfromSpringer. PermissionsforusemaybeobtainedthroughRightsLinkattheCopyrightClearanceCenter.Violations areliabletoprosecutionundertherespectiveCopyrightLaw. Theuseofgeneraldescriptivenames,registerednames,trademarks,servicemarks,etc.inthispublication doesnotimply,evenintheabsenceofaspecificstatement,thatsuchnamesareexemptfromtherelevant protectivelawsandregulationsandthereforefreeforgeneraluse. While the advice and information in this book are believed to be true and accurate at the date of publication,neithertheauthorsnortheeditorsnorthepublishercanacceptanylegalresponsibilityfor anyerrorsoromissionsthatmaybemade.Thepublishermakesnowarranty,expressorimplied,with respecttothematerialcontainedherein. Printedonacid-freepaper SpringerispartofSpringerScience+BusinessMedia(www.birkhauser-science.com) JosephA.Wolf,Oberwolfach,1984 Preface This volume is dedicated to Joseph A. Wolf on the occasion of his 75th birthday. ParticipantsattheconferenceinBochuminWolf’shonor,whichtookplaceinearly January 2012, had the chance to express their respect and their thanks for Joe’s fundamentalcontributionsto mathematicsand to wish him continuedgoodhealth andsuccessforthecomingyears.We,theeditorsofthisvolume,wouldliketotake thisopportunitytoputthesewishesinwriting. Almost60ofJoe’s75yearshavebeendevotedtomathematics.Attheageof15, hewasgrantedaFordFoundationscholarshiptobeginhisundergraduatestudiesat theUniversityofChicago.Atfirsthisparentswereratherskepticalaboutthisidea, butAdrianAlbert,whohadbeenafriendofJoe’sfatherintheirundergraduatedays, calmedtheirworries.Joestartedoutinabroadliberalartsprogrambutstimulatedby lecturesfromLang,Kaplansky,Spanier,andChern,andwiththesupportofAdrian Albert in the background, he soon gravitated to a concentration in mathematics. Early on Joe became particularly interested in Riemannian geometry.As a result, with the support of an NSF Graduate Fellowship, he stayed on in Chicago to do hisgraduateworkwithChern.CoursesfromHelgason,MacLane,Palais,Sternberg, Stone, and Weil, in additionto those mentionedabove,broadenedhis foundation. WhenitbecameclearthathewoulddirecthisresearchtowardRiemanniangeometry and homogeneous spaces, he helped organize a seminar on Cartan’s work on symmetric spaces, the members of which included Chern, Helgason, Palais, and Sternberg. Atthattime,thelate1950s,thespiritofthetheoryoffinitegroupswasinvading Chicago.Forexample,JohnThompsonwasone ofJoe’s officemates. Maybethis contributed to Joe’s optimism to suggest to Chern to consider the Clifford–Klein sphericalspace form problem as a thesis project. Chern found a way to smoothly indicatethatJoedidn’tyetknowenoughaboutfinitegroups.SoJoeenteredthearea ina morerealisticway byextendingtheresultsofVincentforspherestocompact homogeneous spaces G=K where rk.G/ D rk.K/ C 1 and G satisfies a certain cohomologicalcondition.Later,inhisbookSpacesofConstantCurvature,nowin its 6th edition, Joe gave the classification of complete Riemannian manifolds of constantpositivecurvature. ix

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